linux-kernel - Re: [PATCH 1/2] mfd: madera: Improve handling of regulator unbinding

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Message-ID: <20191216105452.GH3601@dell>
Date:   Mon, 16 Dec 2019 10:54:52 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc:     broonie@...nel.org, lgirdwood@...il.com,
        patches@...nsource.cirrus.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mfd: madera: Improve handling of regulator unbinding

On Mon, 09 Dec 2019, Charles Keepax wrote:

> The current unbinding process for Madera has some issues. The trouble
> is runtime PM is disabled as the first step of the process, but
> some of the drivers release IRQs causing regmap IRQ to issue a
> runtime get which fails. To allow runtime PM to remain enabled during
> mfd_remove_devices, the DCVDD regulator must remain available. In
> the case of external DCVDD's this is simple, the regulator can simply
> be disabled/put after the call to mfd_remove_devices. However, in
> the case of an internally supplied DCVDD the regulator needs to be
> released after all the MFD children, except for the regulator child
> itself, have been removed. This is achieved by having the regulator
> driver itself do the disable/put, as it is the last driver removed from
> the MFD.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
> ---
>  drivers/mfd/madera-core.c | 20 ++++++++++++--------
>  1 file changed, 12 insertions(+), 8 deletions(-)

I'm okay with it if Mark is:

For my own reference:
  Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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